Merge pull request dotnet/coreclr#8106 from mikedn/magic-div

Move magic division optimization from morph to lowering

Commit migrated from https://github.com/dotnet/coreclr/commit/d92a1ce6f6e76a431263b4acf1d152664d0d8703

diff --cc src/coreclr/src/jit/assertionprop.cpp
Simple merge

diff --cc src/coreclr/src/jit/codegenxarch.cpp
Simple merge

diff --cc src/coreclr/src/jit/compiler.h
Simple merge

diff --cc src/coreclr/src/jit/lower.cpp
Simple merge

diff --cc src/coreclr/src/jit/lowerxarch.cpp
Simple merge

diff --cc src/coreclr/src/jit/morph.cpp
Simple merge

diff --cc src/coreclr/src/jit/valuenum.cpp
Simple merge